TV LINE answered some fan questions again and one of them was Klaus related:
Question: Got any scoop on The Vampire Diaries? How long is the gang going to be clueless about Klaus’ whereabouts inside of Tyler? —Karolina
Ausiello: “Not long,” offers EP Julie Plec. “But long enough for there to be some cases of mistaken identity.”
Thanks to the loveliest Joseph Morgan Fan for this information.